1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved. 4 */ 5 6 #define pr_fmt(fmt)"[drm-dp] %s: " fmt, __func__ 7 8 #include <linux/debugfs.h> 9 #include <drm/drm_connector.h> 10 #include <drm/drm_file.h> 11 12 #include "dp_parser.h" 13 #include "dp_catalog.h" 14 #include "dp_aux.h" 15 #include "dp_ctrl.h" 16 #include "dp_debug.h" 17 #include "dp_display.h" 18 19 #define DEBUG_NAME "msm_dp" 20 21 struct dp_debug_private { 22 struct dentry *root; 23 24 struct dp_usbpd *usbpd; 25 struct dp_link *link; 26 struct dp_panel *panel; 27 struct drm_connector *connector; 28 struct device *dev; 29 struct drm_device *drm_dev; 30 31 struct dp_debug dp_debug; 32 }; 33 34 static int dp_debug_show(struct seq_file *seq, void *p) 35 { 36 struct dp_debug_private *debug = seq->private; 37 u64 lclk = 0; 38 u32 link_params_rate; 39 const struct drm_display_mode *drm_mode; 40 41 if (!debug) 42 return -ENODEV; 43 44 drm_mode = &debug->panel->dp_mode.drm_mode; 45 46 seq_printf(seq, "\tname = %s\n", DEBUG_NAME); 47 seq_printf(seq, "\tdrm_dp_link\n\t\trate = %u\n", 48 debug->panel->link_info.rate); 49 seq_printf(seq, "\t\tnum_lanes = %u\n", 50 debug->panel->link_info.num_lanes); 51 seq_printf(seq, "\t\tcapabilities = %lu\n", 52 debug->panel->link_info.capabilities); 53 seq_printf(seq, "\tdp_panel_info:\n\t\tactive = %dx%d\n", 54 drm_mode->hdisplay, 55 drm_mode->vdisplay); 56 seq_printf(seq, "\t\tback_porch = %dx%d\n", 57 drm_mode->htotal - drm_mode->hsync_end, 58 drm_mode->vtotal - drm_mode->vsync_end); 59 seq_printf(seq, "\t\tfront_porch = %dx%d\n", 60 drm_mode->hsync_start - drm_mode->hdisplay, 61 drm_mode->vsync_start - drm_mode->vdisplay); 62 seq_printf(seq, "\t\tsync_width = %dx%d\n", 63 drm_mode->hsync_end - drm_mode->hsync_start, 64 drm_mode->vsync_end - drm_mode->vsync_start); 65 seq_printf(seq, "\t\tactive_low = %dx%d\n", 66 debug->panel->dp_mode.h_active_low, 67 debug->panel->dp_mode.v_active_low); 68 seq_printf(seq, "\t\th_skew = %d\n", 69 drm_mode->hskew); 70 seq_printf(seq, "\t\trefresh rate = %d\n", 71 drm_mode_vrefresh(drm_mode)); 72 seq_printf(seq, "\t\tpixel clock khz = %d\n", 73 drm_mode->clock); 74 seq_printf(seq, "\t\tbpp = %d\n", 75 debug->panel->dp_mode.bpp); 76 77 /* Link Information */ 78 seq_printf(seq, "\tdp_link:\n\t\ttest_requested = %d\n", 79 debug->link->sink_request); 80 seq_printf(seq, "\t\tnum_lanes = %d\n", 81 debug->link->link_params.num_lanes); 82 link_params_rate = debug->link->link_params.rate; 83 seq_printf(seq, "\t\tbw_code = %d\n", 84 drm_dp_link_rate_to_bw_code(link_params_rate)); 85 lclk = debug->link->link_params.rate * 1000; 86 seq_printf(seq, "\t\tlclk = %lld\n", lclk); 87 seq_printf(seq, "\t\tv_level = %d\n", 88 debug->link->phy_params.v_level); 89 seq_printf(seq, "\t\tp_level = %d\n", 90 debug->link->phy_params.p_level); 91 92 return 0; 93 } 94 DEFINE_SHOW_ATTRIBUTE(dp_debug); 95 96 static int dp_test_data_show(struct seq_file *m, void *data) 97 { 98 const struct dp_debug_private *debug = m->private; 99 const struct drm_connector *connector = debug->connector; 100 u32 bpc; 101 102 if (connector->status == connector_status_connected) { 103 bpc = debug->link->test_video.test_bit_depth; 104 seq_printf(m, "hdisplay: %d\n", 105 debug->link->test_video.test_h_width); 106 seq_printf(m, "vdisplay: %d\n", 107 debug->link->test_video.test_v_height); 108 seq_printf(m, "bpc: %u\n", 109 dp_link_bit_depth_to_bpc(bpc)); 110 } else { 111 seq_puts(m, "0"); 112 } 113 114 return 0; 115 } 116 DEFINE_SHOW_ATTRIBUTE(dp_test_data); 117 118 static int dp_test_type_show(struct seq_file *m, void *data) 119 { 120 const struct dp_debug_private *debug = m->private; 121 const struct drm_connector *connector = debug->connector; 122 123 if (connector->status == connector_status_connected) 124 seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN); 125 else 126 seq_puts(m, "0"); 127 128 return 0; 129 } 130 DEFINE_SHOW_ATTRIBUTE(dp_test_type); 131 132 static ssize_t dp_test_active_write(struct file *file, 133 const char __user *ubuf, 134 size_t len, loff_t *offp) 135 { 136 char *input_buffer; 137 int status = 0; 138 const struct dp_debug_private *debug; 139 const struct drm_connector *connector; 140 int val = 0; 141 142 debug = ((struct seq_file *)file->private_data)->private; 143 connector = debug->connector; 144 145 if (len == 0) 146 return 0; 147 148 input_buffer = memdup_user_nul(ubuf, len); 149 if (IS_ERR(input_buffer)) 150 return PTR_ERR(input_buffer); 151 152 DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len); 153 154 if (connector->status == connector_status_connected) { 155 status = kstrtoint(input_buffer, 10, &val); 156 if (status < 0) { 157 kfree(input_buffer); 158 return status; 159 } 160 DRM_DEBUG_DRIVER("Got %d for test active\n", val); 161 /* To prevent erroneous activation of the compliance 162 * testing code, only accept an actual value of 1 here 163 */ 164 if (val == 1) 165 debug->panel->video_test = true; 166 else 167 debug->panel->video_test = false; 168 } 169 kfree(input_buffer); 170 171 *offp += len; 172 return len; 173 } 174 175 static int dp_test_active_show(struct seq_file *m, void *data) 176 { 177 struct dp_debug_private *debug = m->private; 178 struct drm_connector *connector = debug->connector; 179 180 if (connector->status == connector_status_connected) { 181 if (debug->panel->video_test) 182 seq_puts(m, "1"); 183 else 184 seq_puts(m, "0"); 185 } else { 186 seq_puts(m, "0"); 187 } 188 189 return 0; 190 } 191 192 static int dp_test_active_open(struct inode *inode, 193 struct file *file) 194 { 195 return single_open(file, dp_test_active_show, 196 inode->i_private); 197 } 198 199 static const struct file_operations test_active_fops = { 200 .owner = THIS_MODULE, 201 .open = dp_test_active_open, 202 .read = seq_read, 203 .llseek = seq_lseek, 204 .release = single_release, 205 .write = dp_test_active_write 206 }; 207 208 static void dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor) 209 { 210 char path[64]; 211 struct dp_debug_private *debug = container_of(dp_debug, 212 struct dp_debug_private, dp_debug); 213 214 snprintf(path, sizeof(path), "msm_dp-%s", debug->connector->name); 215 216 debug->root = debugfs_create_dir(path, minor->debugfs_root); 217 218 debugfs_create_file("dp_debug", 0444, debug->root, 219 debug, &dp_debug_fops); 220 221 debugfs_create_file("msm_dp_test_active", 0444, 222 debug->root, 223 debug, &test_active_fops); 224 225 debugfs_create_file("msm_dp_test_data", 0444, 226 debug->root, 227 debug, &dp_test_data_fops); 228 229 debugfs_create_file("msm_dp_test_type", 0444, 230 debug->root, 231 debug, &dp_test_type_fops); 232 } 233 234 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, 235 struct dp_usbpd *usbpd, struct dp_link *link, 236 struct drm_connector *connector, struct drm_minor *minor) 237 { 238 struct dp_debug_private *debug; 239 struct dp_debug *dp_debug; 240 int rc; 241 242 if (!dev || !panel || !usbpd || !link) { 243 DRM_ERROR("invalid input\n"); 244 rc = -EINVAL; 245 goto error; 246 } 247 248 debug = devm_kzalloc(dev, sizeof(*debug), GFP_KERNEL); 249 if (!debug) { 250 rc = -ENOMEM; 251 goto error; 252 } 253 254 debug->dp_debug.debug_en = false; 255 debug->usbpd = usbpd; 256 debug->link = link; 257 debug->panel = panel; 258 debug->dev = dev; 259 debug->drm_dev = minor->dev; 260 debug->connector = connector; 261 262 dp_debug = &debug->dp_debug; 263 dp_debug->vdisplay = 0; 264 dp_debug->hdisplay = 0; 265 dp_debug->vrefresh = 0; 266 267 dp_debug_init(dp_debug, minor); 268 269 return dp_debug; 270 error: 271 return ERR_PTR(rc); 272 } 273 274 static int dp_debug_deinit(struct dp_debug *dp_debug) 275 { 276 struct dp_debug_private *debug; 277 278 if (!dp_debug) 279 return -EINVAL; 280 281 debug = container_of(dp_debug, struct dp_debug_private, dp_debug); 282 283 debugfs_remove_recursive(debug->root); 284 285 return 0; 286 } 287 288 void dp_debug_put(struct dp_debug *dp_debug) 289 { 290 struct dp_debug_private *debug; 291 292 if (!dp_debug) 293 return; 294 295 debug = container_of(dp_debug, struct dp_debug_private, dp_debug); 296 297 dp_debug_deinit(dp_debug); 298 299 devm_kfree(debug->dev, debug); 300 } 301